Add missing iTunes tags - #97

Missing tags according to #96 (plus season tag):

• channel/itunes:type
• item/itunes:title
• item/itunes:episodeType
• item/itunes:episode
• item/itunes:season

Hi, this has been lying around for a while now, is there something stopping you from merging it?

From my side no, but I would level a guess that @lkiesow hasn't had time to look at it

Would be great to see this merged and published. WIthout this, one can't implement the full podcast RSS spec using feedgen and must explore other options. Is this project still maintained?

Hey @joeyrobert, maybe not exactly what you'd like, but I have been using pip install git+https://github.com/olikami/python-feedgen for the moment being. Not perfect but works!

I’m using the same at the moment unfortunately. Would really like to see @lkiesow take a look at this. I’m also wondering if this project is abandoned.

Thanks @olikami, I'll use your fork for the time being. Appreciate this PR!